1 files changed, 49 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/vect/vect-recurr-pr121256-2.c b/gcc/testsuite/gcc.dg/vect/vect-recurr-pr121256-2.c
new file mode 100644
index 0000000..7350fd9
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-recurr-pr121256-2.c
@@ -0,0 +1,49 @@
+/* { dg-additional-options "-mavx2" { target avx2_runtime } } */
+
+#include "tree-vect.h"
+
+#define B 0
+#define G 1
+#define R 2
+
+int red = 153;
+int green = 66;
+int blue = 187;
+
+static void __attribute__((noipa))
+sub_left_prediction_bgr32(int *restrict dst, int *restrict src)
+{
+  for (int i = 0; i < 8; i++) {
+    int rt = src[i * 3 + R];
+    int gt = src[i * 3 + G];
+    int bt = src[i * 3 + B];
+
+    dst[i * 3 + R] = rt - red;
+    dst[i * 3 + G] = gt - green;
+    dst[i * 3 + B] = bt - blue;
+
+    red = rt;
+    green = gt;
+    blue = bt;
+  }
+}
+
+int main()
+{
+  int dst[8*3];
+  int src[8*3] = { 160, 73, 194, 17, 33, 99, 0, 12, 283, 87, 73, 11,
+		   9, 7, 1, 23, 19, 13, 77, 233, 97, 78, 2, 5 };
+  int dst2[8*3] = {-27, 7, 41, -143, -40, -95, -17, -21, 184, 87, 61,
+      -272, -78, -66, -10, 14, 12, 12, 54, 214, 84, 1, -231, -92};
+
+  check_vect ();
+
+  sub_left_prediction_bgr32(dst, src);
+
+#pragma GCC novector
+  for (int i = 0; i < 8*3; ++i)
+    if (dst[i] != dst2[i])
+      __builtin_abort();
+
+  return 0;
+}